Issue #3206358 by longwave, RenatoG: Remove bag initialization in SessionManager

core/lib/Drupal/Core/Session/SessionManager.php

@@ -89,14 +89,6 @@ public function __construct(RequestStack $request_stack, Connection $connection,
     $this->connection = $connection;
 
     parent::__construct($options, $handler, $metadata_bag);
-
-    // @todo When not using the Symfony Session object, the list of bags in the
-    //   NativeSessionStorage will remain uninitialized. This will lead to
-    //   errors in NativeSessionHandler::loadSession. Remove this after
-    //   https://www.drupal.org/node/2229145, when we will be using the Symfony
-    //   session object (which registers an attribute bag with the
-    //   manager upon instantiation).
-    $this->bags = [];
   }
 
   /**